As far as I know, only States have the right to issue currencies. In my country to create a currency is a very serious matter that can take you to prison for many years and I don’t think my country is an exception. Why do you think Satoshi Nakamoto is an anonymous person? This is at least one of the reasons. If you are seriously thinking of creating a currency do a very deep research on legality about this on your country.
you will be surprised... the US as a state DOESN'T issue currency
Central Bank(s) both in the US and around the world issue currencies,central banks have monopoly over issuing currency(fiat money) and recieving seigniorage (
https://en.wikipedia.org/wiki/Seigniorage)
they regulate the production of currency by banks (credit) through monetary policy
in the US Federal Reserve System or FRS is a "country within a country"-not controlled by any legislative branch at all
and yes,stealing the right for seigniorage is the worst offense ever,worse than mass genocide,wars have been started for less